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Capacities and Failure Modes of Suction Bucket Foundation with Internal Bulkheads

Journal of Ocean University of China 2017年第4期16卷 627-634页

作者： XIAO Zhong ge borui WANG Yan State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Tianjin 300072 P. R. China

Suction bucket foundations can be divided into four compartments by cruciform internal bulkheads,thereby yielding better capacity in certain conditions than those without internal *** yet,no systematic study has been conducted regarding the effects of cruciform internal bulkheads on the capacities of suction bucket *** this study,we established a large number of finite element models of suction bucket foundations with and without cruciform internal bulkheads and of solid embedded circular *** found the uniaxial capacities and failure modes of suction bucket foundations with various depth ratios to remain basically unaffected by internal bulkheads in uniform ***,in inhomogeneous clay with high strength heterogeneity,we observed the uniaxial moment and horizontal capacities and corresponding failure modes of suction bucket foundations with a low depth ratio to be obviously affected by internal *** this case,the uniaxial moment capacities,in particular,as well as the horizontal capacities of suction bucket foundations with cruciform internal bulkheads become obviously greater than those without internal *** combined loading,we found the failure envelopes of suction bucket foundations with and without cruciform internal bulkheads and of solid circular foundation to also be basically consistent in uniform ***,in inhomogeneous clay with high strength heterogeneity,cruciform internal bulkheads can obviously change the shapes of the failure envelopes of bucket foundations with a small depth *** conclude that when the acting vertical load or foundation depth is relatively small,suction bucket foundations with cruciform internal bulkheads can be subjected to larger moment and horizontal loads in soft clays with high strength heterogeneity.

关键词： capacity bucket foundation internal bulkheads undrained clay failure modes

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Exercise preconditioning alleviates ischemia-induced memory deficits by increasing circulating adiponectin

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Neural Regeneration Research 2025年第5期20卷 1445-1454页

作者： Meifeng Zheng borui Zhang Sonata S Y Yau Kwok-Fai So Li Zhang Haining Ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNS Regeneration(Ministry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Science Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercise and Brain Science School of PsychologyShanghai University of SportShanghaiChina Neuroscience and Neurorehabilitation Institute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral ischemia is a major health risk that requires preventive approaches in addition to drug *** exercise enhances neurogenesis and synaptogenesis,and has been widely used for functional rehabilitation after *** this study,we determined whether exercise training before disease onset can alleviate the severity of cerebral *** also examined the role of exercise-induced circulating factors in these *** mice were subjected to 14 days of treadmill exercise training before surgery for middle cerebral artery *** found that this exercise pre-conditioning strategy effectively attenuated brain infarct area,inhibited gliogenesis,protected synaptic proteins,and improved novel object and spatial memory *** analysis showed that circulating adiponectin plays a critical role in these preventive effects of *** activation of adiponectin receptors by Adipo Ron mimicked the effects of exercise,while inhibiting receptor activation abolished the exercise *** summary,our results suggest a crucial role of circulating adiponectin in the effects of exercise pre-conditioning in protecting against cerebral ischemia and supporting the health benefits of exercise.

关键词： adiponectin cerebral ischemia exercise pre-conditioning hippocampus memory function middle cerebral artery occlusion prefrontal cortex synaptic proteins treadmill exercise

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Forebody asymmetric vortex control with extended dielectric barrier discharge plasma actuators

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Chinese Physics B 2020年第6期29卷 286-295页

作者： borui Zheng Ming Xue Chang ge School of Automation and Information Engineering Xi’an University of TechnologyXi’an 710048China School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Plasma control of forebody asymmetric vortices is mostly achieved by means of dielectric barrier discharge(DBD)plasma actuators. However, DBD actuators suffer from some disadvantages such as a weak induced body force, a singledirection induced jet, and an unclear control mechanism. We carry out wind tunnel experiments involving the forebody vortex control of a slender body at high angles of attack using an innovative extended DBD actuator, which has a stronger capacity to induce an electric wind than a DBD actuator. Through synchronous measurements of the pressure distribution and particle image velocimetry(PIV), the spatiotemporal evolution of the dynamic interactions between plasma-actuationinduced vortices and forebody asymmetric vortices is analyzed. The influence of plasma discharge on the boundary layer separation around a slender body and the spatial topological structures of asymmetric vortices are further surveyed, as the optimized actuation parameters. Extended DBD actuators are found to be more capable of controlling asymmetric vortices than DBD actuators, and a linear proportionality of the sectional lateral force versus the duty ratio is *** exists an optimal normalized reduced frequency( f+= 2π fpd/U∞= 2.39) for asymmetric vortex control under the present experimental conditions. The research results can provide technical guidance for the control and reuse of forebody asymmetric vortices.

关键词： plasma flow control dielectric barrier discharge forebody asymmetric vortex

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Immersive visualization of 3D subsurface ground model developed from sparse boreholes using virtual reality(VR)

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Underground Space 2024年第4期17卷 188-206页

作者： borui Lyu Yu Wang Department of Architecture and Civil Engineering City University of Hong KongKowloon 999077Hong KongChina

Analytics and visualization of multi-dimensional and complex geo-data,such as three-dimensional(3D)subsurface ground models,is critical for development of underground space and design and construction of underground structures(e.g.,tunnels,dams,and slopes)in engineering *** complicated 3D subsurface ground models now can be developed from site investigation data(e.g.,boreholes)which is often sparse in practice,it remains a great challenge to visualize a 3D subsurface ground model with sophisticated stratigraphic variations by conventional two-dimensional(2D)geological *** reality(VR)technology,which has an attractive capability of constructing a virtual environment that links to the physical world,has been rapidly developed and applied to visualization in various disciplines *** on the rapid development of VR,this study proposes a framework for immersive visualization of 3D subsurface ground models in geo-applications using VR *** 3D subsurface model is first developed from limited borehole data in a data-driven ***,a VR system is developed using related software and hardware devices currently available in the markets for immersive visualization and interaction with the developed 3D subsurface ground *** results demonstrate that VR visualization of the 3D subsurface ground model in an immersive environment has great potential in revolutionizing the geo-practices from 2D cross-sections to a 3D immersive virtual environment in digital era,particularly for the emerging digital twins.

关键词： Immersive visualization 3D subsurface model Virtual reality Virtual environment Interaction

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Tubular micro/nanoengines： boost motility in a tiny world

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Science Bulletin 2017年第8期62卷 525-527页

作者： borui Xu Yongfeng Mei Department of Materials Science Fudan University Shanghai 200433 China

Since 20th century,the development of rocket science has put forward to the dream of humankind that one day we can reach other planets except for observing them through *** rockets get rid of gravity by a powerful engine,consuming chemical fuel to generate a vast *** by rockets and motors in macroscale,researchers on nanoscience and nanotechnology are able to construct engines which can carry and transport cargos

关键词：诺贝尔化学奖管状运动世界纳米科学地心引力推力计算研究人员

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含隐伏断层底板原生缺陷致灾前兆研究

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煤炭技术 2025年第1期44卷 216-220页

作者：王博睿张远航山东科技大学安全与环境工程学院山东青岛266590

为探究隐伏断层底板复杂构造活化致灾前兆规律,遏制含隐伏断层底板原生裂隙对导水通道的促进作用,运用了FLAC3D数值模拟软件,通过对比分析得到随掘过程中原生缺陷结构辨识方法及致灾前兆规律。研究结果表明:在导水通道的形成前,原生缺... 详细信息

为探究隐伏断层底板复杂构造活化致灾前兆规律,遏制含隐伏断层底板原生裂隙对导水通道的促进作用,运用了FLAC3D数值模拟软件,通过对比分析得到随掘过程中原生缺陷结构辨识方法及致灾前兆规律。研究结果表明:在导水通道的形成前,原生缺陷结构沿采掘反方向长40 m、宽30 m的区域被看作原生缺陷结构的剪应力、压应力异常辨识区域;异常辨识区域内监测点剪应力不断升高,并在工作面过隐伏断层后剪应力呈下降趋势;异常辨识区域内监测点压应力都呈现“降低—升高”趋势,且监测点压应力的升高趋势亦可作为原生缺陷结构辨识信息。为安全绿色开采高承压水上煤炭资源,实现安全过隐伏构造提供科学理论及工程指导。

关键词：隐伏断层原生缺陷数值模拟致灾前兆

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农田作业车的RBF-PID横向路径跟踪控制研究

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农机化研究 2025年第4期47卷 42-49页

作者：项波瑞赵祚喜廖志辉米亚龙张清河华南农业大学工程学院广州510642 华南农业大学车辆导航与控制实验室广州510642

针对农业现代化背景下大块农田环境的农用车辆路径跟踪作业的需求,采用RBF神经网络自整定PID控制参数的方法优化传统的基于增量式PID的车辆横向路径跟踪算法,建立3-6-1结构的RBF神经网络,以目标路径位置、实际行驶位置和上一周期方向盘... 详细信息

针对农业现代化背景下大块农田环境的农用车辆路径跟踪作业的需求,采用RBF神经网络自整定PID控制参数的方法优化传统的基于增量式PID的车辆横向路径跟踪算法,建立3-6-1结构的RBF神经网络,以目标路径位置、实际行驶位置和上一周期方向盘转角为输入量,隐藏层设置6个神经元,输出量为方向盘转角,通过梯度下降法对PID的参数实时调整。最后,利用CarSim/Simulink对基于约翰迪尔825i Gator车型改造的农田取土采样车进行建模和仿真,结果表明:在低速(10 km/h)的U形(蛇形)路径下,平均误差为3.89 cm,最大误差为16.61 cm,标准差为5.99 cm,跟踪效果优于传统增量式PID控制,鲁棒性良好,能满足常见的农田作业车辆路径跟踪工况的作业需求。

关键词：农田作业车横向路径跟踪 RBF-PID CarSim/Simulink

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Horrible hepatic portal venous gas

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Hepatobiliary Surgery and Nutrition 2020年第2期9卷 267-268页

作者： borui Sun Chun Zhang Department of Anesthesiology the First Affi liated Hospital of Xi’an Jiao Tong UniversityXi’an 710061China Department of Surgical Intensive Care Unit the First Affi liated Hospital of Xi’an Jiao Tong UniversityXi’an 710061China

A 58-year-old man with no past medical or surgical history presented to our institute with persistent abdominal pain lasted for 12 *** hospitalization the patient presented with coma,persistent hypotension(unable to detect)and *** physical examination,the pulse was weak and his abdomen was tremendous distension without bowel *** examination of blood revealed that an arterial blood pH of 6.9,a lactate level of 24 mmol per liter,and a serum procalcitonin level of 35.62 nanogram per milliliter.

关键词： arterial hepatic examination

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Improving mechanical properties and high-temperature oxidation of press hardened steel by adding Cr and Si

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1865-1875页

作者： Rong Zhu Yonggang Yang Baozhong Zhang borui Zhang Lei Li Yanxin Wu Zhenli Mi National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing 102206China Manufacturing Management Department Ningbo Iron&Steel Co.Ltd.Ningbo 315800China Hunan Valin Lianyuan Iron and Steel Co. Ltd.Loudi 417009China

This work investigated the effect of Cr and Si on the mechanical properties and oxidation resistance of press hardened *** indicated that the microstructure of the Cr-Si micro-alloyed press hardened steel consisted of lath martensite,M_(23)C_(6)carbides,and retained *** retained austenite and carbides are responsible for the increase in elongation of the micro-alloyed *** addition,after oxidation at 930℃for 5 min,the thickness of the oxide scales on the Cr-Si micro-alloyed press hardened steel is less than 5μm,much thinner than 45.50μm-thick oxide scales on *** oxide scales of the Cr-Si micro-alloyed steel are composed of Fe_(2)O_(3),Fe_(3)O_(4),mixed spinel oxide(FeCr_(2)O_(4)and Fe_(2)SiO_(4)),and amorphous SiO_(2).Adding Cr and Si significantly reduces the thickness of the oxide scales and prevents the generation of the FeO *** to the increase of spinel FeCr_(2)O_(4)and Fe_(2)SiO_(4)phase in the inner oxide scale and the amorphous SiO_(2)close to the substrate,the oxidation resistance of the Cr-Si micro-alloyed press hardened steel is improved.

关键词： Cr-Si micro-alloyed press hardened steel mechanical properties oxidation resistance amorphous SiO_(2)

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Performance Analysis of Optical Transmission Based on Seven Cores Fiber

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China Communications 2016年第9期13卷 113-120页

作者： Hang Zhou Fu Wang borui Li Ming Tang Xiangjun Xin School of Electronic Engineering Beijing University of Posts and Telecommunication Wuhan National lab for Optoelectronics(WNLO) Huazhong University of Sci&Tech(HUST)

This essay designed a kind of new seven-core fiber with lower crosstalk and loss, and made space division multiplexing transmission experiment based on this seven-core fiber. It is known that crosstalk has the most serious influence in multicore fiber transmission process. Before the experiment, the affecting factors of fiber crosstalk were analyzed through simulation, such as core space, bending radius, and fiber length. Combined with the simulation analysis, the design scheme of multicore fiber with low crosstalk was obtained. Before the fiber design, various factors of influence crosstalk such as the core- to-core distance, bending radius, fiber length and so on. Based on the simulation analysis, conclusion has made on the design scheme of multi-core optimal fiber with low crosstalk. The space division multiplexing and wavelength division multiplexing technology, was adopted to conduct seven-core optical fiber transmission of *** crosstalk of adjacent core was suppressed to as low as 45dB / km, the attenuation of inner core was 0.24dB/ km, the outer cores＇ 0.32dB/km. Different bit error rate （BER） performances were also studied under different conditions, through reasonably designing the system to reduce the error rate, improve the performance of the system, and realize long distance and large capacity transmission with fiber.

关键词： multicore fiber crosstalk space division multiplexing

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